The multiplier settings should be irrelavent, as the CPU itself over-rides any of them.
So even though the motherboard tries to make it 5.5, it'll still run at the...er....whatever multiplier it was intended to run. EXCEPT, the old LX motherboards had a restriction of nothing higher than an 8x multiplier, or something to that effect. I'm not up to snuff in that category....but depending upon the bios, you can go all the way up to 733mhz 😉